Springer Timothy A insider trades
Springer Timothy A has filed 40 Form 4s with the SEC that we hold, for Cartesian Therapeutics, Inc. (RNAC) (Director, 10% owner), MORF (Director, 10% owner) and Tectonic Therapeutic, Inc. (TECX) (Director, 10% owner). Across all of them we count 80 purchases worth $142.8M and 0 sales worth $0 reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a purchase of 1,050,000 shares of MORF worth $47.2M, dated 2023-05-03. The first filing on our record is dated 2021-08-20 and the latest 2026-06-10.
Cartesian Therapeutics, Inc. (RNAC)
Director, 10% owner · 23 filings · 55 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-12-09 | P, purchase reported on Form 4 | 3,748,000 | $11.5M | 2021-12-13 |
| 2021-12-10 | P, purchase reported on Form 4 | 58,681 | $175.5K | 2021-12-13 |
| 2021-12-13 | P, purchase reported on Form 4 | 14,592 | $43.5K | 2021-12-13 |
| 2021-12-15 | P, purchase reported on Form 4 | 211,190 | $631.5K | 2021-12-17 |
| 2022-04-11 | P, purchase reported on Form 4 | 6,681,600 | - | 2022-04-13 |
| 2024-01-17 | P, purchase reported on Form 4 | 800 | $552 | 2024-03-28 |
| 2024-02-06 | P, purchase reported on Form 4 | 800 | $520 | 2024-03-28 |
| 2024-02-07 | P, purchase reported on Form 4 | 2,400 | $1.6K | 2024-03-28 |
| 2024-03-08 | P, purchase reported on Form 4 | 4,800 | $3.2K | 2024-03-28 |
| 2024-03-11 | P, purchase reported on Form 4 | 1,200 | $780 | 2024-03-28 |
| 2024-03-12 | P, purchase reported on Form 4 | 1,200 | $732 | 2024-03-28 |
| 2024-03-13 | P, purchase reported on Form 4 | 3,200 | $1.9K | 2024-03-28 |
| 2024-03-14 | P, purchase reported on Form 4 | 2,000 | $1.1K | 2024-03-28 |
| 2024-03-14 | P, purchase reported on Form 4 | 648,372 | $350.1K | 2024-03-18 |
| 2024-03-15 | P, purchase reported on Form 4 | 1,200 | $672 | 2024-03-28 |
| 2024-03-15 | P, purchase reported on Form 4 | 537,500 | $317.1K | 2024-03-18 |
| 2024-03-18 | P, purchase reported on Form 4 | 800 | $488 | 2024-03-28 |
| 2024-03-18 | P, purchase reported on Form 4 | 19,044 | $11.4K | 2024-03-20 |
| 2024-08-12 | P, purchase reported on Form 4 | 8,016 | $102.0K | 2024-08-14 |
| 2024-10-02 | P, purchase reported on Form 4 | 5,514 | $95.8K | 2024-10-04 |
| 2024-10-03 | P, purchase reported on Form 4 | 50,489 | $1.0M | 2024-10-04 |
| 2024-10-03 | P, purchase reported on Form 4 | 29,847 | $544.7K | 2024-10-04 |
| 2024-10-03 | P, purchase reported on Form 4 | 8,043 | $175.8K | 2024-10-04 |
| 2024-10-03 | P, purchase reported on Form 4 | 21,278 | $450.5K | 2024-10-04 |
| 2024-10-03 | P, purchase reported on Form 4 | 10,249 | $194.8K | 2024-10-04 |
| 2024-10-04 | P, purchase reported on Form 4 | 4,879 | $116.8K | 2024-10-04 |
| 2024-10-04 | P, purchase reported on Form 4 | 16,650 | $392.4K | 2024-10-04 |
| 2024-10-04 | P, purchase reported on Form 4 | 48,880 | $1.1M | 2024-10-04 |
| 2024-10-04 | P, purchase reported on Form 4 | 9,892 | $211.2K | 2024-10-04 |
| 2024-11-14 | P, purchase reported on Form 4 | 22,242 | $377.4K | 2024-11-18 |
| 2024-11-14 | P, purchase reported on Form 4 | 74,157 | $1.2M | 2024-11-18 |
| 2024-11-15 | P, purchase reported on Form 4 | 277,246 | $4.7M | 2024-11-18 |
| 2024-11-18 | P, purchase reported on Form 4 | 38,114 | $684.5K | 2024-11-18 |
| 2024-11-18 | P, purchase reported on Form 4 | 20,181 | $371.7K | 2024-11-18 |
| 2024-12-19 | P, purchase reported on Form 4 | 10,529 | $193.2K | 2024-12-23 |
| 2024-12-19 | P, purchase reported on Form 4 | 3,376 | $63.9K | 2024-12-23 |
| 2024-12-19 | P, purchase reported on Form 4 | 11,303 | $196.6K | 2024-12-23 |
| 2024-12-20 | P, purchase reported on Form 4 | 21,800 | $412.9K | 2024-12-23 |
| 2024-12-23 | P, purchase reported on Form 4 | 5,181 | $98.4K | 2024-12-23 |
| 2025-01-13 | P, purchase reported on Form 4 | 7,962 | $134.2K | 2025-01-15 |
| 2025-01-13 | P, purchase reported on Form 4 | 8,983 | $159.7K | 2025-01-15 |
| 2025-01-14 | P, purchase reported on Form 4 | 4,022 | $72.4K | 2025-01-15 |
| 2025-03-18 | P, purchase reported on Form 4 | 14,740 | $212.6K | 2025-03-20 |
| 2025-03-19 | P, purchase reported on Form 4 | 20,234 | $302.9K | 2025-03-20 |
| 2025-03-20 | P, purchase reported on Form 4 | 54,889 | $855.7K | 2025-03-20 |
| 2025-04-09 | P, purchase reported on Form 4 | 31 | $308 | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 178 | $1.8K | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 41,604 | $392.3K | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 7,342 | $69.2K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 45,144 | $470.9K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 7,966 | $83.1K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 609 | $6.7K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 3,451 | $37.7K | 2025-04-11 |
| 2025-04-11 | P, purchase reported on Form 4 | 6,412 | $69.1K | 2025-04-11 |
| 2025-04-11 | P, purchase reported on Form 4 | 36,338 | $391.4K | 2025-04-11 |
MORF
Director, 10% owner · 9 filings · 8 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-08-18 | P, purchase reported on Form 4 | 9,208 | $518.9K | 2021-08-20 |
| 2021-08-18 | P, purchase reported on Form 4 | 21,099 | $1.2M | 2021-08-20 |
| 2021-08-19 | P, purchase reported on Form 4 | 13,874 | $788.3K | 2021-08-20 |
| 2021-08-19 | P, purchase reported on Form 4 | 18,916 | $1.1M | 2021-08-20 |
| 2021-08-19 | P, purchase reported on Form 4 | 210 | $11.5K | 2021-08-20 |
| 2021-08-20 | P, purchase reported on Form 4 | 11,511 | $653.8K | 2021-08-20 |
| 2021-08-20 | P, purchase reported on Form 4 | 109 | $6.1K | 2021-08-20 |
| 2023-05-03 | P, purchase reported on Form 4 | 1,050,000 | $47.2M | 2023-05-04 |
Tectonic Therapeutic, Inc. (TECX)
Director, 10% owner · 8 filings · 17 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2024-09-26 | P, purchase reported on Form 4 | 2,400 | $74.1K | 2024-09-26 |
| 2024-09-26 | P, purchase reported on Form 4 | 18,999 | $553.4K | 2024-09-26 |
| 2024-09-26 | P, purchase reported on Form 4 | 24,531 | $690.8K | 2024-09-26 |
| 2024-09-26 | P, purchase reported on Form 4 | 4,070 | $122.5K | 2024-09-26 |
| 2024-10-22 | P, purchase reported on Form 4 | 300,000 | $10.1M | 2024-10-24 |
| 2025-02-05 | P, purchase reported on Form 4 | 129,294 | $7.0M | 2025-02-07 |
| 2025-02-05 | P, purchase reported on Form 4 | 660,000 | $33.0M | 2025-02-07 |
| 2025-04-07 | P, purchase reported on Form 4 | 412,500 | $7.1M | 2025-04-09 |
| 2025-04-07 | P, purchase reported on Form 4 | 87,500 | $1.5M | 2025-04-09 |
| 2025-04-09 | P, purchase reported on Form 4 | 2,861 | $41.8K | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 857 | $13.1K | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 4,856 | $74.0K | 2025-04-11 |
| 2025-04-09 | P, purchase reported on Form 4 | 16,215 | $237.1K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 8,092 | $135.4K | 2025-04-11 |
| 2025-04-10 | P, purchase reported on Form 4 | 45,858 | $767.2K | 2025-04-11 |
| 2025-04-11 | P, purchase reported on Form 4 | 53,706 | $875.9K | 2025-04-11 |
| 2025-04-11 | P, purchase reported on Form 4 | 9,478 | $154.6K | 2025-04-11 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1055624) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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